Improvement in self-adjusting pipe-wrenches



T. WILLIAMS.

Self-Adjusting Pipe-Wrenches.

WITNESSES. INVENTOR. I

I Patented Feb. 25,1873

UNITED STATES PATENT OFFICE.

TURNER WILLIAMS, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN SELF-ADJUSTING PlPE-WRENCHES.

Specification forming part of Letters Patent No. 136,351, dated FebruaryQS, 1873.

To all whom it may concern:

Be it known that I, TURNER WILLIAMS, of Providence, in the county of Providence and State of Rhode Island, have invented a certain new and useful Improved Self-Adjusting Wrench, of which the following is a specification:

The N atme of the Invention.

The'nature of my invention consists in com.- bining in a wrench a fixed jaw having a convex toothed bearing-surface with acorresponding eccentrically-moving concaved jaw, the moving jaw being so pivoted to the fixed jaw that, when the wrench is applied, the tendency is for the movable jaw to swing toward the fixed one, and thus grasp the intervening object. The moving jaw is also combined with a spring so as to be impelled toward the fixed aw.

By this arrangement of a swing scroll-jaw no adjustment is required, as the wrench may be applied to any pipe or bolt within its ran ge,- and will grasp the same automatically.

Description of the Drawing.

Figure 1 is an elevation of my invention. Fig. 2 1s a section of the same.

General Description.

spring, which acts through the block E upon the back of the movable jaw, and serves to close it upon the fixed jaw.

If desirable, the spring F may be dispensed with, and a lever to be moved by hand sub stituted for it.

I claim as my invention-- The combination of the jaw D, the block or tumbler E, and spring F with the fixed jaw B, operating substantially as described, and for the purpose set forth.

TURNER WILLIAMS.

Witnesses V FRANK G. PARKER,

H. FLOYD FAULKNER. 

